Energy dependence of the differences between the quark and gluon jet fragmentation

6533b855fe1ef96bd12b0040

RESEARCH PRODUCT

Energy dependence of the differences between the quark and gluon jet fragmentation

M. L. Andrieux Wojciech Kucewicz Tiziano Rovelli J. Masik V. Ruhlmann-kleider Josef Strauss P. Abreu C. Caso V. Chabaud M. Espirito Santo W. Venus M. S. Bilenky Patrick Jarry J. Chauveau L.j. Carroll G. Rinaudo P.a. Fischer H. B. Crawley A. Firestone Juan Abel Barrio L. Brillault R. Henriques R. Nicolaidou I. Kronkvist M. Feindt J. Medbo D. Bertrand D. Bertrand A. Buys S. Sánchez Navas Fabio Cossutti Fabio Cossutti H. Palka P. Weilhammer Jiri Chudoba Luc Pape A. Zalewska Mariusz Witek M. Gunther T. Lesiak P. Negri Rupert Leitner G. Piana Sandra Amato K. Belous T. Brenke M. Pindo J. P. Engel P. Bambade M. V. Castillo Gimenez Paul Dauncey N. Demaria G. Damgaard M. Verlato G. Matthiae B. Golob M. Zito V. Gracco M. Berggren Imad Baptiste Laktineh Klaus Mönig Fabrizio Parodi M. A. Houlden S. Marti I Garcia G. Cosme W. Da Silva J. Garcia K. Grzelak M. Prest M. Prest W. Ruckstuhl W. K. Van Doninck W. K. Van Doninck F. Richard P. Chochula C. Matteuzzi S. Almehed R. Chierici F. Hahn G. Vegni S. Squarcia H. Saarikko Allan Hallgren E. I. Rosenberg T. Spassov A. N. Sisakian A. Sadovsky Lucio Cerrito J.d. Richardson V. Obraztsov M. A. Winter Richard Jacobsson A. Galloni P. Sponholz S. O. Holmgren G. D. Alekseev I. Lippi K. Kurvinen D. Wicke Javier Sánchez R. Sosnowski P. Vincent J. H. Wickens J. H. Wickens Marco Paganoni Jose Luis Contreras L. Mundim L. Mundim A. Petrolini B. De Lotto B. De Lotto T. Tabarelli Piotr Zalewski G. Crosetti Evgueni Vlasov M. Gibbs T. Todorov Pierre Juillot I. Roncagliolo B. Koene S. Hoorelbeke S. Hoorelbeke F. Naraghi Paolo Ronchese E. Cortina Winfried Mitaroff H. Rahmani N. J. Kjaer L. S. Vertogradov P. Poropat P. Poropat Denis Gelé H. Herr D. Fassouliotis L. G. Tkatchev B. Jean-marie A. Seitz C. Vander Velde C. Vander Velde Ariella Cattai G. A. Chelkov L. Vitale L. Vitale F. Martinez-vidal D. Radojicic Louis Lyons R. Aleksan F. Ledroit O. Podobrin Jacques Lemonne Jacques Lemonne A. Klovning U. Mjoernmark C. Bosio A. G. Frodesen M. Mc Cubbin W. Oberschulte-beckmann Y. Arnoud A. Tonazzo O. Ullaland R. C. Shellard R. C. Shellard Josef Hrubec Leif J. Jönsson Paolo Morettini J. G. Loken C. De Saint-jean P. Beilliere Ch. Jarlskog W. D. Apel M. Michelotto P. Carrilho Andrei Nomerotski Krzysztof Nawrocki Tord Ekelof B. Loerstad K. Hultqvist O. Yushchenko Demetrios Loukas R. Sekulin H. Pernegger Manfred Krammer V.a. Uvarov H. Wahlen Ugo Amaldi W. De Boer E. Zevgolatakos A. G. Olshevski J. J. Hernandez B. Franek G. Tristram R. Barate Klaus Hamacher P. Rebecchi P. Bruckman G. Valenti H. T. Phillips Vladimir Cindro T. Moa Tiziano Camporesi W. Hao O. Barring A. Baroncelli G. Maehlum J. N. Jackson G. Sciolla H. J. Hilke A. M. Segar F. Fontanelli Antonio Ferrer R. A. Brenner C. Kreuter P. Van Dam S. J. Alvsvaag E. Agasi F. Pierre J. W. Lamsa K. H. Becks M. Blume F. Barao A. Deghorain A. Deghorain Vincent Hedberg D. W. Lane J. Rames P. Kokkinias C. K. Legan E. Vallazza Maciej Górski D. J. Holthuizen W. Krupinski P. Lutz Fares Djama M. Davenport Antonio Onofre William Trischuk A. Markou F. Simonetto P. Jalocha F. Dupont P. Seager G. Ekspong P. Siegrist L. Di Ciaccio E. Higon S. Bosworth J-c. Marin B. Erzen R. Gokieli Robert S. Brown C. De La Vaissiere U. Schwickerath P. H. Kramer S. C. Blyth G. Wilkinson J. M. Lopez Mogens Dam P. N. Ratoff F. Carena Maria Roberta Monge F. Scuri F. Scuri S. Simonetti M. Begalli M. Begalli P. Gunnarsson N. N. Khovanski Pierre Billoir W. Bartl Spyros Tzamarias O. Tchikilev A. M. Wetherell B. Tome G. Leder B. ÅSman V. Lefebure V. Lefebure P. V. Chliapnikov D. Crennell F. Mandl W.s.c. Williams P. Antilogus J. P. Gerber J. P. Laugier A. Tilquin J.-e. Augustin L. Lanceri L. Lanceri Stéphane Plaszczynski V. Chorowicz Barry King W. T. Meyer E. Spiriti C. Defoix P. J. Holt J. Baudot N. G. Redaelli M. Pimenta B. A. Khomenko F. Fulda-quenzer R. Frühwirth Wolfgang Adam A. Stocchi Francesco Navarria S. Cabrera A. Trombini J. Timmermans P. Niss F. Stichelbaut A. Lipniacka R. Alemany Vaclav Vrba F. Zach Paolo Privitera M. Mazzucato P. Buschmann B. Muryn R. Mc Kay S. S. Meyer A. Andreazza Hans Dijkstra P. Langefeld I. Stavitski Laurent Mirabito C. Gaspar D. Vilanova T. Maron Marco Bozzo P. Paganini N. Pukhaeva Paul Baillon D. Zontar M. Szeptycka L. Gorn S. Lamblot Yu. Belokopytov G. C. Zucchelli J. Dahm Konstantinos Papageorgiou R. Keranen Francisco Matorras Th D. Papadopoulou D. Souza-santos D. Souza-santos G. Borisov E. Graziani J. M. Brunet L.n. Gerdyukov M. Battaglia W. Neumann T. Bolognese T. J. V. Bowcock M. Baubillier V. Lepeltier T. L. Hessing Y. Dufour Sandor Czellar P. Frenkiel Paolo Checchia G. Polok O. Klapp Ph. Gavillet M. Kaiser Yu. Gouz Stefano Ragazzi V. Canale Borge Svane Nielsen J. Macnaughton S. De Brabandere S. De Brabandere Ernesto Migliore Krzysztof Doroba Chiara Meroni Peter Kluit Claire Bourdarios M. Nieuwenhuizen Juan Fuster A. M. Zaitsev Alexander Vodopyanov M. Pernicka F. Bianchi T. Buran Markus Elsing F. Waldner F. Waldner F. Formenti F. Cao F. Cao Jesus Marco G. Lenzen C. Walck E. Karvelas V. Kostioukhine M. Koratzinos R. Zuberi A. Normand C. Weiser J. Cuevas Maestro Olga Botner Andrea Perrotta M. Wielers K. Karafasoulis G. Transtromer Carmen García M. L. Turluer D. Reid H. Foeth R. Mc Nulty Gianni Zumerle B. Ueberschaer Andromachi Tsirou M. Tyndel Andre Augustinus N. Ershaidat A. Tomaradze A. Tomaradze M. Pegoraro A. De Angelis P. Collins Maurizio Canepa Daniel Bloch O. Kouznetsov Ahmimed Ouraou Martino Margoni Chariclia Petridou Chariclia Petridou E. Fokitis Chiara Mariotti Branislav Sitar M.a. Lopez Aguera S. Hahn Francesca Romana Cavallo Ugo Gasparini M. Reale N. Neumeister Daniel Treille M. Bigi K. A. Drees V. V. Lapin J. Guy C. De Clercq C. De Clercq W. J. Murray J. Ridky R. Strub Tim Adye C. Parkes P. Kubinec Nikita Smirnov P. Herquet P. Herquet Clara Troncon R. Contri T. Burgsmueller Manolis Dris Alberto Benvenuti R. Lauhakangas Ph. Charpentier J. Dolbeau M. Donszelmann Danilo Zavrtanik P.s.l. Booth Phillip Allport G. Della Ricca G. Della Ricca José Salt Cristian Stanescu P. Branchini H. Schneider K. D. Brand N. I. Zimin Maria Elena Pol Maria Elena Pol S. Katsanevas D. Y. Bardin M. Karlsson T. A. Filippas M. Regler R. Ehret Yu. Sedykh L. Bugge H. Mueller A. J. Camacho Rozas D. Z. Toet I. Ripp R. Janik D. Edsall G. Grosdidier K. Korcyl Alessandra Romero A. Ruiz M. A E Schyns B. Dalmagne L. Tortora F. J. Harris Carlos Lacasta E. K. Johansson I. A. Tyapkin M. Petrovyck I. V. Ajinenko Steinar Stapnes N. Vassilopoulos Lydia Roos C. Martinez-rivero J. Drees J. P. Tavernet Evangelos Gazis V. Malychev L. Chaussard Y. Sacquin Goeran Jarlskog Kathy Huet Kathy Huet Valeriy Pozdniakov P. Pages K. Woschnagg E. C. Katsoufis G. Gopal L. De Paula E. Falk P. Roudeau Per Jönsson M. J. Bates M. Bonesini Toralf Bernhard Skaali D. Gamba W. Bonivento F. Verbeure F. Verbeure Kerem Cankocak B. Stugu S. Gumenyuk Alexander Lincoln Read Luis Peralta F. Kapusta A. Pullia Marcos Dracos M. Chen M. Chen Marek Szczekowski E. Rosso H. Klein K. Osterberg P. B. Renton D. C. Fries B. Marechal Marta Calvi Geoffrey Smith Mario Sannino M. Gandelman M. Gandelman B. Bouquet G. W. Van Apeldoorn L. Ventura K. Yip R. Lindner Y. Lemoigne R. Orava M. Weierstall Christine Kourkoumelis E. Dahl-jensen A. Passeri G. Eigen G. Smadja J. Van Eldik T. S. Hill M. Schimmelpfennig P. Delpierre G. Myatt R. Moeller L. K. Resvanis Massimo Caccia Vladimir Nikolaenko Z. Krumstein A. De Min I. Siccama G. Sajot O. Smirnova C. Joram C. Bricman C. Bricman

subject

Quark Particle physics E+E ANNIHILATION Physics and Astronomy (miscellaneous)Astrophysics::High Energy Astrophysical Phenomena High Energy Physics::Lattice Hadron 7. Clean energy 01 natural sciences Bottom quark Partícules (Física nuclear)Nuclear physics COLLIDER 0103 physical sciences CHARGED-PARTICLE MULTIPLICITY [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]3-JET EVENTS DISTRIBUTIONS ALPHA-S Nuclear Experiment 010306 general physics DELPHI Quantum chromodynamics Physics 010308 nuclear & particles physics ALGORITHMS High Energy Physics::Phenomenology Perturbative QCD LEP gluon fragmentation LARGE ELECTRON POSITRON COLLIDER QCD Photon structure function CHARGED-PARTICLE MULTIPLICITY; E+E ANNIHILATION; ROOT-S; 3-JET EVENTS; ALPHA-S; LEP; DISTRIBUTIONS; ALGORITHMS; COLLIDER; QCD Gluon Three-jet event ROOT-S LEP; DELPHI; 3-jet events; gluon fragmentation PARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHI PARTICLE PHYSICS Física nuclear High Energy Physics::Experiment Particle Physics - Experiment

description

Three jet events arising from decays of the Z beson, collected by the DELPHI detector, were used to measure differences in quark and gluon fragmentation. Gluon jets were anti-tagged by identifying b quark jets. Unbiased quark jets came from events with two jets plus one photon. Quark and gluon jet properties in different energy ranges were compared for the first time within the same detector. Quark and gluon jets of nearly the same energy in symmetric three jet event topologies were also compared. Using three independent methods, the average value of the ratio of the mean charged multiplicities of gluon and quark jets is [ r ] = 1.241 +/- 0.015 (stat.) +/- 0.025 (syst.). Gluon jets are broader and produce fragments with a softer energy spectrum than quark jets of equivalent energy. The string effect has been observed in fully symmetric three jet events. The measured ratio R(gamma) of the charged particle flow in the inter-jet region of the and samples agrees with the perturbative QCD expectation. The dependence of the mean charged multiplicity on the hadronic center-of-mass energy was analysed in photon plus n-jet events. The value for alpha(s)(M(z)) determined from these data using a QCD prediction with corrections at leading and next-to-leading order is alpha(s)(M(z)) = 0.116 +/- 0.003 (stat.) +/- 0.009 (syst.).

year	journal	country	edition	language
1996-01-01

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